#Question id: 174
#Section 2: General Biology
What is the net charge on the dipeptide Arg-Pro at pH 9.0? The table below gives the pKaʹs of the ionizable groups on the free amino acids.
#Question id: 175
#Section 2: General Biology
The ionic charges associated with a protein molecule are ________.
#Question id: 176
#Section 2: General Biology
A peptide has the sequence Glu–His–Trp–Ser–Gly–Leu–Arg–Pro–Gly. What is the net charge of the molecule at pH 3
#Question id: 178
#Section 2: General Biology
Given the pKa values of different acidic sites in cysteine, the principal ionic form which will never exist at any pH
#Question id: 180
#Section 2: General Biology
Which of the following statements about aromatic amino acids is correct?
#Question id: 181
#Section 2: General Biology
Titration of valine by a strong base, for example NaOH, reveals two pK’s. The titration reaction occurring at pK2 (pK2 = 9.62) is: